Custom Interface: Need same help to install addon

 From:  MoI3D_fun.it (NINNO)
7187.1 
Hello everyone!
This is my problem: I do not know how to install in MoI3D CustomUI.1.03. addon for windows. Kindly can anyone tell me how to do it? I've already downloaded from the forum the zipped folder. A small step by step guide would be very helpful. Thanks in advance for your help.

EDITED: 18 Jan 2015 by NINNO